| Chenliang, a famous thinker of Nan Song Dynasty, was the outstanding person of Yong Kang School. His thought was not taken over from teachers and it didn't form a system. While his thought was characteristic of Utilitarianism. He maintained theory should be practical and can be used to guide the management of a society, opposed to talk in generalities. His these thought all were aim at then reality to propose. His these thought have the important status in the Chinese thought history. Cheng Liang expressed his ethic thought based on simple materialism's Philosophy. The theory has five character,for example, "The morals origin from the daily life ","unity of reason and desire", "integration of loyalty and benefit", and "learning to be",the moral criterion impressed on realistic effect,which still be benefit to today's system of moral criterion. The introduction partially political,the economical,the cultural context and Chenliang's thought development course which forms to the Chenliang utilitarianism ethics thought, has made the detailed elaboration.This article divides into four parts: This article first three chapters launch the evaluation to the ChenLiang's utilitarianism ethics theory, passes " reason and desire "," righteousness and benefit " " motivation and impact " three aspects to comethe concrete analysis, and separately pointed out Chen Liang the utilitarianism thought foundation is "the reason in the desire" the thought, His utilitarianism which takes the actual efficiency, his utilitarianism has the social utility the nature,as well as his motive and effect unified theory.This article author has made the detailed elaboration in the article secondchapter about " hegemonism and fame ". Fourth chapter elaborated the Chen bright utilitarianism ethics thought modern enlightenment. His social achievement doctrine is a challenge to traditional ethics, which has had a far-reaching impact on later age. I thought the critique inherits and brings honor to Chen Liang theutilitarianism thought, uses in to instruct now under the Chinese characteristic socialism spiritual civilization construction modernlife to have the reality the significance. |